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fast write but ~slow read~ and how to make permanent hdparm settings

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  • Author

ok since my preclearing finished after 3 days  :P i started to diagnose my problem.

 

connected 2 pc directly without switch or router.

 

tried with windows xp to windows xp with new and good network drivers and such.

tried to play with network cards settings like flow control jumbo frames and such

tried to play with protocol settings optimize tcpip and such

tried with kubuntu to unraid

tried with kubuntu to windows

tried with different hard disk drives

tried with different cable

 

so far nothin changes all i see is slow transfer speeds

checked the bios for some settings and such but nothing there.

 

all the tests are made with a short cat 6 cable and the fastest drives possible

both mobo using on board realtek gigabit network ic and i dont have any other gigabit network card in my hand to test more

 

maybe i make my cables wrong? i used T-568B straight standart

 

this drives me nuts why is it so slow

 

what can i do more?

 

 

I'm not sure that you can do anything more - I'm looking at that motherboard that you posted a link to above and wondering whether it is simply a limitation of the chipset/CPU/NIC combo.  Not trying to be nasty, but it's a pretty weak motherboard, and could likely be the issue.  Just because a motherboard has a gigabit NIC doesn't mean the rest of the componentry is up to supplying that sort of speed.

 

Do you have a laptop (or friend's laptop/PC) that you could connect up and test copies with?  This would at least eliminate this potential cause.

  • Author

yea thats what i was thinking. will need anoter gigabit capable device shall borrow some from friends.

 

was testing network with some programs and i suspect the problem is my main pcs nic

 

the main pc mainboard is gigabyte ep35c with onboard realtek nic its acting up i guess

test.PNG.1d148500713a370666ec0979046a03bd.PNG

test2.PNG.85c0b08504ecb8daddf1017769bb75a6.PNG

  • Author

i tried with different/old versions of drivers for realtek 8111B chip but no speed boost yet. on top of that i cant get that 50ish speeds which i was able to see yestarday. its allways 20ish now with every driver i try

 

im stuck here without another gigabit nic to test with heh

  • Author

from what i see on the web 8111B nic is a problem child.. i may have to get a new nic afterall. got my eyes on a intel pcie x1 card looks nice but expensive locally and time consuming if i shop abroad. oh well

  • 2 weeks later...
  • Author

ok now i got a brand new intel gigabit ct network adapter and my reading speeds  from unraid server does not seem to differ boo...

 

anyway im gonna get a different mainboard as soon as i can  it was a  low power test built afterall.

 

another question i just bought license from official limetech site and i dont know what is the next step. will they email me some kinda license file or shall i just restart somethin?

 

since i bought a brand new flash drive for the licenced version of unraid the server is on parity check now so i cannot restart and see : )

 

how is the licensing process goes? shall i do anything?

 

thnks in advance

 

edit;

nvm i found it in the main page

 

After your purchase is complete, you will receive a payment confirmation email. Once your order has been processed, you will receive a separate email from Lime Technology with your registration key data file(s) attached. Please allow 24-48 hours for receipt of your registration key (usually the same business day). If you have not received your key, please check your email spam filter.

 

To install the Registration Key, simply copy the key data file to the config directory of your Flash and reboot your server.

 

just have to wait then.

 

i still would like opinions about the low transfer speeds im getting tho. i hope its just the atom board that causes trouble.

  • 3 weeks later...
  • Author

hello again,

 

after toying with a weak test server now i got a more serious one in my hands and growing slowly. got a new mobo P8P67 PRO with onboard intel 82579 nic and better harware with more disks. since i filled the boards 8 disk limit gonna add some cheap pciex1 asmedia1061 based sata cards and later on a PERC H200 sas card with even more disks.

 

but i got questions.

 

to keep things simple i will try to explain the setup i got

version: 5.0-rc13

using smb between win pc and unraid server. windows pc got an Intel EXPI9301CT Desktop Adapter Gigabit CT network card and a fast enough ssd drive and all the copy tests are done with that ssd. windows pc got no firewall or such.

 

the unraid server got fast 7200 rpm seagate baracuda disks that does 160ish parity check speeds and a crappy old cache drive for testing. also played with cat6 cables and win pc side network settings there is no unneeded services and such on network side and played with intels advanced network settings. also tried with switch and without switch direct connection with pc and unraid server with 1 cable and different cables as well cat6, cat5e i even made a new short cat6 cable just to make sure.

 

 

anyway the questions are;

 

1)

  when i write to cache drive everything is fine the crappy old 250gb cache disk does 80~90ish write speeds but when i try to read from cache drive it gives me 60ish speeds. tried with one of the fast seagate drives which connected to native sata3 port and the result is same gives me 60ish transfer speeds. tried with user shares and then disk shares and then disabling user shares completely. no matter what i try its 60ish cant go higher on reads from unraid to pc

 

  when i try to play with mtu settings for bigger jumbo frame and test if i can get more transfer speeds the unraid machine looses connection or at least it seems like that. the telnet client keeps open still with ifconfig eth0 mtu 9014 settings but the webgui, unmenu and smb goes down. when i get the 1500 mtu back with the still running putty on winpc everything is fine again can access webgui and such. i thought the intel 82579 got jumbo frames supported. seems like chip got 2 versions LM and V versions i dunno which one i got in my mobo but seems like both supports large mtu sizes ( http://ark.intel.com/products/52963/Intel-82579V-Gigabit-Ethernet-PHY // http://ark.intel.com/products/47620/Intel-82579LM-Gigabit-Ethernet-PHY )

 

  is there a way to enable bigger mtu sizes with this chip or am i doin somethin wrong? i just wanna see if i can get more transfer speeds with the help of different mtu sizes. the harware is capable so i want more speed if possible..

what else can u guys suggest other then playing with mtu? i doubt it but gotta ask; i got loads of big and small files and folders in my user shares in unraid server can it effect my transfer speeds?

 

 

2)

  since i got those chirp sounding seagate drives i played with hd parm also. the sound makes me nervous and all the disks got some high fly writes in the smart reports allready they are pretty new i dunno if i shall be worried but anyway the question is; is there a way to make hdparm settings permanent? i loose the hdparm settings when i reboot the unraid server which is disturbing. shall i add hd parm commands to go script or somethin like that?

 

i see ppl get 100ish read speeds from unraid i envy them and know that its possible

how do they get those kidna speeds is beyond me at this point tho

 

all i want is to get the max out of my unraid server while im at start of the permanent build so i can grow on it with confidence

please gimme suggestions to try

 

thnks in advance

 

 

 

 

 

edit;

when i wanted to add syslog i noticed lines like these Tower kernel:  [mem 0x00200000-0x33ffffff] page 2M 4M and such what are they ? shall i run memtest?

 

another edit;

nvm after i stop playin with plugins and a clean reboot the errors are gone for good as it seems. (ps: simple features causes slow parity checks and other complications so i had to let it go)

 

{update; its not the simple features that causes slow parity check speeds its the cache dirs. maybe its checking or caching while the parity is running..}

 

but i still want to see more transfer speeds im greedy  :P 

 

pls gimme a hand

syslog-2013-06-09.txt

  • Author

no one has any idea?

 

i guess reading all that detail keep people away from giving me some suggestions. to make it simpler i sum it up

 

problems/questions;

 

1) in ideal conditions (fast disks, clean stock unraid, intel gigabit network and decent hardware) i write to unraid faster then i read.

2) cannot change mtu settings in unraid server, when i try anything above 1500 it gets silly

2) how can i make hdparm settings permanent?

 

thnks in advance

 

  • Author

ok after some more playing (super clean stock unraid) i managed to activate jumbo frames its mtu 9000 now and the speeds did improve. but the main problem still exists i write faster then i read : (

 

changed the cache drive to a decent fast 500gb one SAMSUNG HD502HJ that can read and write ~120M average

 

and here is my latest scores on that drive

 

write to unraid

q7byuam5ve543nmbg.jpg?size_id=4

 

read from unraid

88usijg7mybjupwbg.jpg?size_id=4

 

so clearly something is wrong and i dont know how to fix it

and need hdparm help too

no one has any idea?

 

i guess reading all that detail keep people away from giving me some suggestions. to make it simpler i sum it up

 

problems/questions;

 

1) in ideal conditions (fast disks, clean stock unraid, intel gigabit network and decent hardware) i write to unraid faster then i read.

And you will for most small and medium sized files, since you are writing to the disk buffer cache (until it fills)  With 4GB of RAM, most files fit entirely in RAM and the writing is limited mostly by network I/O.  When reading, you are limited by the disk I/O speed (unless the file is still in the disk buffer cache)

2) cannot change mtu settings in unraid server, when i try anything above 1500 it gets silly

2) how can i make hdparm settings permanent?

Add lines to the end of your config/go file.

thnks in advance

You are welcome.
  • Author

yay hdparm permanent settings : )

 

and my speeds are perfectly fine for me as of now i just got greedy i think.. so i wont see higher read speeds oh well.. got 4gb ram copying to unraid 12gb file for test i did not expect super fast small file speeds on small files (i cant even measure their speeds before the copy is over :) ) just wanted a tad more speed on bigger files like ~10gb. so i tested with big files for real world simulation and played with everything in my mind that can help.

 

the logic of mine was if i can write at 90M i shall be able to read 90M too

 

thank you Joe but i still did not clearly understand if i can achive better read speeds with big files (bigger then disk cache and even bigger than my ram), shall i continue jiggling with small details for better reading speeds on big files?

 

thank you again

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